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quarantining can break akka cluster #25632
When a node is quarantined, it will be automatically downed and removed from the cluster. If this happens at a time when other nodes are unreachable this can lead to a split-brain situation. Problem is that the downing provider is not consulted / aware of the issue and as such can't prevent the split-brain from happening.
I explained this in more detail in
and provided a detailed example in
As far as I understand, this issue is present in both 2.4 and 2.5